sunday, we'll have the key players from all sides: white house chief of staff bill daley and senators jon kyl, dick durban, mark warner and saxby chambliss. that's sunday on "face the nation." oslo, norway, is where the nobel peace prize is awarded, but today the city known for peace was marred by terrible violence. a powerful bomb exploded near the prime minister's office. he was not hurt, but at least seven people are dead and 15 were injured there. shortly after that, a man dressed in a police uniform opened fire with a rifle on a group of young people at a resort island. police say at least nine were killed there. an arrest was made in that shooting and police believe the two incidents are connected. we begin our coverage with jeff glor in oslo. jeff? >> reporter: bob, good evening to you. oslo is clearly a city shaken tonight. the prime minister of norway called this day "brutal." the explosions ripped through downtown oslo at 3:30 local time. the first images: windows blown out, rubble in the streets, huge plumes of smoke, evoking memories of terror attacks elsewhere but up until no